Finding the Third Proportional to 158,412 and 329,928

Step by Step Solution

1. Step 1: Write the proportion equation
   158,412 : 329,928 = 329,928 : x
2. Step 2: Convert to fraction form
   158,412/329,928 = 329,928/x
3. Step 3: Cross multiply
   158,412x = 329,928 × 329,928
4. Step 4: Simplify right side
   158,412x = 108,852,485,184
5. Step 5: Solve for x
   x = 108,852,485,184/158,412
6. Step 6: Final answer
   x = 687,147.98